Magical lightbulbs!

Oh man, I wish I had some of these lightbulbs when I was decorating for Halloween. Instead of getting out the ladder and replacing the white porch lights with black ones, I could have changed the colors with a click of a wireless-remote button. 

Not only can the lights shine sixteen different colors, but the bulbs save you energy, and you can set them to strobe when you throw raves.

$19.50, Chinavasion.com

Thanks to Kimberly for the tip!